(3/7x-5/6)*1 2/13=2 1/2

(3/7x-5/6)*1 2/13=2 1/2
(3/7x-5/6)*15/13=5/2
3/7x-5/6=5/2:15/13
3/7x-5/6=5/2*13/15
3/7x-5/6=1/2*13/3
3/7х-5/6=13/6
3/7х=13/6+5/6
3/7х=18/6
3/7х=3
х=3:3/7
х=3*7/3
х=7